原位生长石墨烯增强铜基材料的制备及其热性能研究  

Preparation and thermal properties of in-situ grown graphene reinforced copper matrix materials

作　　者：张利琪 李红伟[1,2] 乔宇燨 钱宗豪 ZHANG Liqi;LI Hongwei;QIAO Yuxi;QIAN Zonghao(School of Materials Science and Engineering, Chang'an University, Xian 710061, China;Engineering Research Center of Transportation Materials of Ministry of Education, Chang'an University,Xi'an 710061, China)

机构地区：[1]长安大学材料科学与工程学院,西安710061 [2]长安大学交通铺面材料教育部工程研究中心,西安710061

出　　处：《功能材料》2022年第6期6095-6099,共5页Journal of Functional Materials

基　　金：长安大学中央高校基础研究项目(300102310110);长安大学创新团队项目(300102311403);长安大学2021大学生创新创业训练计划项目(S202110710323)。

摘　　要：以廉价的蔗糖为碳源,在片状铜粉表面原位生长了石墨烯,并采用热压烧结制备不同石墨烯含量的铜基材料。通过XRD、SEM和激光导热分析了蔗糖含量对铜基材料的相、微观形貌以及热导率的影响。结果表明,在H_(2)/Ar气氛下,800℃处理15 min即可在片状铜粉上原位生长出石墨烯,且分散均匀,与Cu基体结合良好,有利于增强其热性能。当石墨烯含量为0.73%(体积分数)时,铜基材料的热导率达到339 W/(m·K),较纯铜提高了19.3%;此外,在50~300℃温度范围内,其热膨胀系数也明显低于纯Cu样品。In this paper,graphene from inexpensive sucrose is prepared by in-situ growth directly on the Cu flakes,and Cu matrix materials(Cu-MMs)with various in-situ graphene content is fabricated by hot-press sintering.The effect of sucrose content on the phase composition,microstructure and thermal properties of bulk Cu-MMs is studied by XRD,SEM,thermal conductivity(TC)and coefficient of thermal expansion(CTE).Results obtained indicate that after the heat treatment at 800℃for 15 min under the H_(2)/Ar gas flow,the in-situ growth of graphene on the surface of Cu flakes occurs.The graphene exhibits good attachment to Cu matrix and homogenous dispersion,which is beneficial for thermal properties of Cu-MMs.With 0.73vol%grapheme,the TC of Cu-MMs reaches 339 W/(m·K),which is higher by 19.3%than that of Cu,and meanwhile CTE is far lower than that of Cu from 50℃to 300℃.

关 键 词：石墨烯 原位生长 铜基材料 热导率 热膨胀系数 

分 类 号：TB333[一般工业技术—材料科学与工程]